Wikipedia

Queen + Paul Rodgers (sometimes referred to as Q+PR or QPR) were a collaboration between Queen (Brian May and Roger Taylor) and Paul Rodgers formerly of Bad Company, Free, The Firm and The Law. Guitarist May had previously performed with Rodgers on several occasions, including a performance at the Royal Albert Hall.

It was made clear that Rodgers would not be replacing Queen's former lead singer, Freddie Mercury, who died on 24 November 1991. He would simply be "featured with" former Queen members. Former Queen bass guitarist John Deacon declined to participate in the collaboration due to his retirement in 1997. The group's three principal members May, Taylor and Rodgers were supplemented on tour by Queen's former touring keyboard player Spike Edney, rhythm guitarist Jamie Moses, and bass guitarist Danny Miranda who had previously worked with Blue Öyster Cult. Throughout their career the band completed two world tours, issued the first studio album for Queen in nearly 15 years entitled The Cosmos Rocks, and released two live DVDs and a live album.

Rodgers announced in May 2009 that the 'Queen + Paul Rodgers' collaboration had come to an end, saying "it was never meant to be a permanent arrangement". He did, however, leave open the possibility for future collaborations.